This document is the user manual for the ARM embedded HMI intelligent serial port display terminal produced by Guangzhou ZLGMCU Development Co., LTD. The document introduces the features and characteristics of the product, as well as usage instructions and function lists.
The ZLG UM01 is an ARM‑embedded HMI smart serial display terminal that offers a visual interface via a simple RS‑232 serial connection. It supports 3.5‑inch (320×240) and 4.3‑inch (480×272) TFT LCDs, a four‑wire resistive touchscreen, and a rich command set for drawing, text, images and touch interaction.
This manual describes the terminal’s electrical parameters, mechanical dimensions, communication protocol, command reference, and the optional simulation software. It also covers installation, touchscreen calibration, and flash memory configuration. This manual is written in Chinese.
| Power supply | DC 5 V, 500 mA |
|---|---|
| Operating current (backlight on) | 300 mA |
| Communication interface | 3‑wire RS232 (DIN/DOUT/GND), 115200 bps |
| LCD type | 3.5" 320×240 TFT or 4.3" 480×272 TFT |
| Touchscreen type | Four‑wire resistive |
| Display colors | 16‑bit (65 K) color |
| Operating temperature range | -20 °C to 70 °C |
| Flash memory (configurable) | 4 MB – 16 MB |
| Backlight type | LED |
It uses a 3‑wire RS232 serial interface (DIN/DOUT/GND) with a default baud rate of 115200 bps.
Send the E4 command (AA E4 55 AA 5A A5) to start calibration; to abort, reset the terminal via the nRST pin.
It is offered with either a 3.5‑inch 320×240 TFT LCD or a 4.3‑inch 480×272 TFT LCD.